Table of Contents
Can an object be moving in one direction and accelerating in another?
Yes. Even though the initial and final speeds are the same, there has been a change in direction for the object. Thus, there is an acceleration.
What 2 things can cause acceleration?
Acceleration is the name we give to any process where the velocity changes. Since velocity is a speed and a direction, there are only two ways for you to accelerate: change your speed or change your direction—or change both.
How do you know if two objects will meet physics?
For the objects to meet, they have to be in the same place at the same time, so set the x’s equal to each other, and solve for the time (since it is the same t on both sides.)
What is the acceleration of an object from one point to another?
Calculating acceleration involves dividing velocity by time — or in terms of SI units, dividing the meter per second [m/s] by the second [s]. Dividing distance by time twice is the same as dividing distance by the square of time. Thus the SI unit of acceleration is the meter per second squared .
What is the relationship of speed and position of object?
The greater the speed an object has, the faster it changes position.
Does constant speed mean no acceleration?
First, constant speed does not mean zero acceleration. An object could be going on a curved path at constant speed. The object has an acceleration. Zero acceleration means constant velocity.
Does 0 velocity mean 0 acceleration?
Yes indeed. Derivative of velocity with respect to time is acceleration. That means if accelerations is zero, velocity must be constant. Also if the velocity is 0(which is itself a constant) also indicates that acceleration is zero.
What is acceleration at constant speed?
The rate of change of the velocity of a particle with respect to time is called its acceleration. For example, if the velocity of a particle moving in a straight line changes uniformly (at a constant rate of change) from 2 m/s to 5 m/s over one second, then its constant acceleration is 3 m/s2.
Why does acceleration stay constant?
Sometimes an accelerating object will change its velocity by the same amount each second. This is referred to as a constant acceleration since the velocity is changing by a constant amount each second. An object with a constant acceleration should not be confused with an object with a constant velocity.
What is the relationship between acceleration and velocity?
Acceleration is the rate of change of velocity. (when velocity changes -> acceleration exists) If an object is changing its velocity, i.e. changing its speed or changing its direction, then it is said to be accelerating. Acceleration = Velocity / Time (Acceleration)
What is acceleration over time?
Acceleration is the rate at which the velocity of a body changes with time. Because acceleration is velocity in m/s divided by time in s, we can derive a graph of acceleration from a graph of an object’s speed or position.
Can a body have uniform speed but still have acceleration?
(i) A body can have acceleration even when it has uniform speed. A body in uniform circular motion has uniform speed but at every point its direction of velocity changes, so its motion is accelerated. (ii) Yes, a body can have acceleration even when its velocity is zero.
Can a body have 0 velocity and still be accelerating?
Yes, an object can have zero velocity and still be accelerating simultaneously. Then the object will start to move in the backward direction.
Can a body have a constant speed and still have a varying velocity?
No, a body can not have its velocity constant, while its speed varies. Rather, it can have its speed constant and its velocity varying. For example in a uniform circular motion.
Can the speed of a body be negative?
Speed = Distance travelled/Time taken The ratio of distance travelled and the time taken by a body can be zero but not negative. Since distance and time are positive quantities and speed is obtained by the ratio of these two quantities, speed cannot be negative.
Can average speed be zero?
The average speed cannot be zero unless the body is stationary over a given interval of time. Average speed is the ratio of the total distance travelled by a body to the total time interval taken to cover that particular distance.
Can a body have zero speed and non-zero acceleration justify?
Answer: (a) True. When a body begins to fall freely under gravity, its speed is zero but it has non-zero acceleration of . When a particle moves with a constant speed in the same direction, neither the magnitude nor the direction of velocity changes and so acceleration is zero.
Can speed be zero?
Yes, it’s possible to have zero speed while accelerating, but only for an instant. Acceleration is the rate at which an object’s speed and direction are changing with time, so whenever an object passes through zero speed as it reverses directions it has a non-zero acceleration but a speed of zero.
Can a particle have acceleration at rest?
Finding the acceleration Thus, even though the velocity of an object at rest must be zero, acceleration can clearly be non-zero for objects at rest. A particle that is thrown vertically upwards stops momentarily at the highest point of motion.
When velocity is 0 What is acceleration?
so if the velocity does not change with time the acceleration is necessarily zero. Since in your example the velocity is constant during the interval that means dv/dt=0 and therefore that a=0 during the interval.
At what point during its motion is the object’s acceleration zero?
At What Point During Its Motion Is The Object’s Acceleration Zero? Its Acceleration Is Never Zero. As It Travels Up.
What is acceleration at the highest point?
When velocity is maximum acceleration?
So, when velocity is maximum, acceleration is minimum (zero).
What’s better speed or acceleration?
Of course there is greater speed when you have faster acceleration because you are increasing speed, but the main issue is one of how quickly an athlete can accelerate and increase speed in a given direction, and not how fast an athlete is capable of sprinting if allowed more time.
Why is velocity zero?
Velocity as a Vector Quantity Because the person always returns to the original position, the motion would never result in a change in position. Since velocity is defined as the rate at which the position changes, this motion results in zero velocity.
Does higher torque mean faster acceleration?
A car with more hp than torque will always be quicker since this gives a car acceleration and speed. Higher torque doesn’t mean one vehicle will necessarily be faster than another, though. For example, a Ford F-250 makes 925 lb-ft of torque, while a Honda S2000 has just 162 lb-ft.
Is maximum speed final velocity?
The maximum speed is called terminal velocity. The terminal velocity of a skydiver in a free-fall position, where they’re falling with their belly towards the Earth is about 195 km/h (122 mph).
Is it better to have more torque or horsepower?
Torque, simply, is the ability of a vehicle to perform work — specifically, the twisting force applied by the crankshaft. Horsepower is how rapidly the vehicle can perform that work. Because there is generally a limit on how fast you can spin an engine, having higher torque allows for greater horsepower at lower rpms.